Dampening apparatus for lithographic presses



(No Model.) 2 SheetsSheet 1.

G. P. FENNER.

DAMPENING APPARATUS FOR LITHOGRAPHIG PBESSES. 7 No. 318,364. PatentedMay 19, 1885..

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2 Sheets-Sheet 2.

(No Model.)

G. P. PENNER. DAMPENING APPARATUS FOR LITHOGRAPHIG PRESSES No. 318,364.Patented May 19, 1885.

Fzjw?" NY PETERS. Fhola-Lrlhogmpher, Washingicn. D C.

UNITED STATES PATENT OFFICE.

GEORGE P. FENNER, OF NE\V LONDON, CONNECTICUT.

DAMPENING APPARATUS FOR LITHOGRAPHIC PRESSES.

SPECIFICATION forming part of Letters Patent No.3l8,364, dated .May 19,1885.

Application filed May 22, 1884. (No model.)

To aZZ whom it may concern Be it known that I, GEORGE P. FENNER, acitizen of the United States, residing at New London, in the county ofNew London and State of Connecticut, have invented new and usefulImprovements in Dampening Apparatus for Lithographic Presses, of whichthe following is a specification.

This invention relates to apparatus for dampening the stone oflithographic-printing presses; and it consists in certain novel featuresof construction, hereinafter described in the specification and claims,whereby the supply of water to the stone can be regulated with nicety.

In the accompanying drawings, Figure l is a side View, partly insection, of a portion of a press embodying my invention. Fig. 2 is avertical cross-section thereof in the plane .00 m, Fig. 1. Figs. and 4care detail views of parts on a larger scale than the preceding figures.

Similar letters indicate corresponding parts.

In the drawings, referring at present especially to Figs. 1 and 2, theletterA designates the press-frame, having suitable bearings, a, for theimpression-cylinder B, and suitable guideways (not shown) for thetraveling bed K. At one end of the frame is arranged the driving-shaftC, from which motion is transmitted to the main shaft D, and from thisshaft motion is inturn transmitted through the medium of the usual.crank, D, and connecting-rod D tothe rack-wheel D which gears into tworacks, 13* 1)", one fixed to the base of the press and the other to thetraveling bed B, for imparting a reciprocating motion to the latter inthe usual manner. The traveling bed B carries thelithographic stone b,and in proper relation thereto are arranged dampening-rollers Q, forwetting the stone, water being conveyed to these rollers by takingrollerQ, from a feed-roller Q", which is arranged in a reservoir, Q", toreceive a revolving motion. The taking-roller has its bearing at one endin a pivoted arm, q, Fig. 2, and at its other end in one arm of thelever Q, and

the feed-roller Q has similar hearings in the pivoted arm q and in onearm of the lever The levers Q} and Q are pivoted to the frame at c, andconnected with cams R 1% on the counter-shaft R the latter being gearedwith the driving-shaft by a worm, R, and a wormwheel, R, or othersuitable device, to receive a revolving motion, so that by the action ofone of the cams, R, the required motion is imparted to the taking-rollerQ from the feedroller Q", and vice versa, while by the action of theother cam, R, a motion is imparted to the feed-roller toward and fromthe takingroller. The cams R R are adjustablysecured to thecounter-shaft R by means of set-screws c 0, so that their throw or leadcan be Varied by rotating them in the proper direc' tion and thenscrewing up on the set-screws. It will be observed that by varying thethrow or lead of the cams the contact of the takingroller Q with thefeed-roller Q, may be varied to the greatest possible extent fordetermining the supply of water to the stone.

To engage the cams R R, the connectingrods Q" Q are each provided with arollerstud, R each rod being, moreover, bifurcated at the lower end tostraddle the counter-shaft R as shown in Fig. 2. Motion is transmittedto the feed-rollers Q? from a suitable part of the press by means of abelt running over a pulley, S, Figs. 2 and 3, mounted on the feedrollershaft. This pulley S is loose, and adjacent thereto is a clutch, S,having a projection, cl, which clutch is keyed to the rollershaft toslide thereon toward and from the pulley, and the projection thereon isadapted to engage a socket, S, of said pulley, so that when this clutchis properly adjusted it on' gages the pulley, thus causing theroller-shaft and roller to share its motion, while these parts may beleft stationary, when desirable. The outward movement of the clutch S isstopped by a shoulder, i on the end of the roller-shaft.

By the means just described it is rendered possible to entirely stop theflow of water to the stone when so desired, as it is evident that whenthe l'eedroller Q ceases to rotate, which is the case when the clutch Sis thrown out of engagement with the pulley S, there can be no watertransferred to the taking-roller.

VhatI claim as new, and desire to secure by Letters Patent, is

1. The combination of the dampening-rollers, the feed-roller, thetaking-roller, the le vers Q Q and the pivoted arms (1 q, forming thebearings for the feed-roller and takley, substantially as and for thepurpose set 10 ing-roller, the counter-shaft, and the adjnstforth.

able cams of said counter-shaft,which engage In testimony whereof I havehereunto set the levers, substantially as and for the purmy hand andseal in the presence of two subpose specified. scribingwitnesses.

2. The combination, with the feed-roller, of GEORGE P. FENNER. [L s.]the driving-pulley mounted loosely on the Witnesses: roller-shaft, andthe sliding clutch keyed to the shaft and constructed to engage the pul-EDWARD T. BROWN; GEORGE COLFAX.

